The beautiful Horton Plains National Park has different sights and fauna to see, but the highlight is The World's End. It is a sheer cliff of about 1,200 m - one of the most photographed and visited sights of Sri Lanka due to its beautiful panorama of the Indian Ocean's coastline. 1,000 m from the main cliff there is a smaller cliff, called Small World's End.
The weather is mostly misty and cloudy in this region, especially in April to September, so it is preferable to avoid these months. Try also to get there really early so you get a better view. On your way back from the World's End, you can spot some remarkable animals, such as the Sambar Deer.